Re: Follow-Up: How to improve db performance with $7K?

I'd use two of your drives to create a mirrored partition where pg_xlog
resides separate from the actual data.

RAID 10 is probably appropriate for the remaining drives.

Fortunately, you're not using Dell, so you don't have to worry about
the Perc3/Di RAID controller, which is not so compatible with Linux...

-tfo

--
Thomas F. O'Connell
Co-Founder, Information Architect
Sitening, LLC
http://www.sitening.com/
110 30th Avenue North, Suite 6
Nashville, TN 37203-6320
615-260-0005

On Mar 31, 2005, at 9:01 PM, Steve Poe wrote:

> Thanks for everyone's feedback on to best improve our Postgresql
> database for the animal hospital. I re-read the PostgreSQL 8.0
> Performance Checklist just to keep focused.
>
> We purchased (2) 4 x 146GB 10,000rpm SCSI U320 SCA drive arrays
> ($2600) and (1) Sun W2100z dual AMD64 workstation with 4GB RAM
> ($2500). We did not need a rack-mount server, so I though Sun's
> workstation would do fine. I'll double the RAM. Hopefully, this should
> out-perform our dual 2.8 Xeon with 4GB of RAM.
>
> Now, we need to purchase a good U320 RAID card now. Any suggestions
> for those which run well under Linux?
>
> These two drive arrays main purpose is for our database. For those
> messed with drive arrays before, how would you slice-up the drive
> array? Will database performance be effected how our RAID10 is
> configured? Any suggestions?
>
> Thanks.
>
> Steve Poe